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NAME="VIEW-PG-PREPARED-XACTS"
>45.58. <TT
CLASS="STRUCTNAME"
>pg_prepared_xacts</TT
></A
></H1
><P
>   The view <TT
CLASS="STRUCTNAME"
>pg_prepared_xacts</TT
> displays
   information about transactions that are currently prepared for two-phase
   commit (see <A
HREF="sql-prepare-transaction.html"
>PREPARE TRANSACTION</A
> for details).
  </P
><P
>   <TT
CLASS="STRUCTNAME"
>pg_prepared_xacts</TT
> contains one row per prepared
   transaction.  An entry is removed when the transaction is committed or
   rolled back.
  </P
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><B
>Table 45-59. <TT
CLASS="STRUCTNAME"
>pg_prepared_xacts</TT
> Columns</B
></P
><TABLE
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><COL><COL><COL><COL><THEAD
><TR
><TH
>Name</TH
><TH
>Type</TH
><TH
>References</TH
><TH
>Description</TH
></TR
></THEAD
><TBODY
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>transaction</TT
></TD
><TD
><TT
CLASS="TYPE"
>xid</TT
></TD
><TD
>&nbsp;</TD
><TD
>       Numeric transaction identifier of the prepared transaction
      </TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>gid</TT
></TD
><TD
><TT
CLASS="TYPE"
>text</TT
></TD
><TD
>&nbsp;</TD
><TD
>       Global transaction identifier that was assigned to the transaction
      </TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>prepared</TT
></TD
><TD
><TT
CLASS="TYPE"
>timestamp with time zone</TT
></TD
><TD
>&nbsp;</TD
><TD
>       Time at which the transaction was prepared for commit
      </TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>owner</TT
></TD
><TD
><TT
CLASS="TYPE"
>name</TT
></TD
><TD
><TT
CLASS="LITERAL"
><A
HREF="catalog-pg-authid.html"
><TT
CLASS="STRUCTNAME"
>pg_authid</TT
></A
>.rolname</TT
></TD
><TD
>       Name of the user that executed the transaction
      </TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>database</TT
></TD
><TD
><TT
CLASS="TYPE"
>name</TT
></TD
><TD
><TT
CLASS="LITERAL"
><A
HREF="catalog-pg-database.html"
><TT
CLASS="STRUCTNAME"
>pg_database</TT
></A
>.datname</TT
></TD
><TD
>       Name of the database in which the transaction was executed
      </TD
></TR
></TBODY
></TABLE
></DIV
><P
>   When the <TT
CLASS="STRUCTNAME"
>pg_prepared_xacts</TT
> view is accessed, the
   internal transaction manager data structures are momentarily locked, and
   a copy is made for the view to display.  This ensures that the
   view produces a consistent set of results, while not blocking
   normal operations longer than necessary.  Nonetheless
   there could be some impact on database performance if this view is
   frequently accessed.
  </P
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